Progress on Skylarkified java_lite_proto_library.

* Exposed transitive_runtime_jars from the former black-box JavaProvider.
* Added support for aliases.
* Returned the runfiles from the Skylark rule of java_lite_proto_library.

--
PiperOrigin-RevId: 147834471
MOS_MIGRATED_REVID=147834471

1 files changed, 12 insertions, 0 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/rules/java/proto/JavaProtoSkylarkCommon.java b/src/main/java/com/google/devtools/build/lib/rules/java/proto/JavaProtoSkylarkCommon.java
index 6f07c4683c..8cb64b0fec 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/java/proto/JavaProtoSkylarkCommon.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/java/proto/JavaProtoSkylarkCommon.java
@@ -84,6 +84,18 @@ public class JavaProtoSkylarkCommon {
   }
 
   @SkylarkCallable(
+      name = "has_proto_sources",
+      doc = "Returns whether the given proto_library target contains proto sources. If there are no"
+          + " sources it means that the proto_library is an alias library, which exports its"
+          + " dependencies."
+  )
+  public static boolean hasProtoSources(ConfiguredTarget target) {
+    SupportData supportData =
+        checkNotNull(target.getProvider(ProtoSupportDataProvider.class).getSupportData());
+    return supportData.hasProtoSources();
+  }
+
+  @SkylarkCallable(
     name = "toolchain_deps",
     // This function is experimental for now.
     documented = false,